鉛(qian)(qian)(qian)是一種暗灰色(se)的(de)(de)(de)(de)金屬(shu)，熔(rong)點為(wei)327℃，它(ta)有(you)很(hen)好(hao)的(de)(de)(de)(de)耐腐(fu)蝕(shi)(shi)性(xing)能，常(chang)用(yong)(yong)來作硫(liu)酸(suan)(suan)設備(bei)(bei)和(he)管(guan)道襯里。鉛(qian)(qian)(qian)在(zai)(zai)大氣、淡水(shui)、海水(shui)中很(hen)穩定，鉛(qian)(qian)(qian)對(dui)硫(liu)酸(suan)(suan)、磷酸(suan)(suan)、亞硫(liu)酸(suan)(suan)、鉻(ge)酸(suan)(suan)和(he)氫氟酸(suan)(suan)等則有(you)良(liang)好(hao)的(de)(de)(de)(de)耐蝕(shi)(shi)性(xing)。鉛(qian)(qian)(qian)不耐硝酸(suan)(suan)的(de)(de)(de)(de)腐(fu)蝕(shi)(shi)，在(zai)(zai)鹽酸(suan)(suan)中也(ye)不穩定。鉛(qian)(qian)(qian)質軟，可(ke)塑性(xing)好(hao)，管(guan)道工程中常(chang)用(yong)(yong)鉛(qian)(qian)(qian)管(guan)。在(zai)(zai)安裝鑄鐵管(guan)承插口(kou)時，常(chang)用(yong)(yong)鉛(qian)(qian)(qian)做接口(kou)填塞材料，以牌號為(wei)Pb6的(de)(de)(de)(de)鉛(qian)(qian)(qian)較(jiao)適宜。硬鉛(qian)(qian)(qian)是鉛(qian)(qian)(qian)和(he)銻的(de)(de)(de)(de)合(he)金，它(ta)的(de)(de)(de)(de)抗腐(fu)蝕(shi)(shi)性(xing)略低于(yu)(yu)純(chun)鉛(qian)(qian)(qian)，但機械強度較(jiao)高，常(chang)用(yong)(yong)于(yu)(yu)制造耐酸(suan)(suan)設備(bei)(bei)。鉛(qian)(qian)(qian)蒸氣有(you)毒(du)，故(gu)熔(rong)化鉛(qian)(qian)(qian)時，要(yao)防止燙傷和(he)鉛(qian)(qian)(qian)中毒(du)。在(zai)(zai)化工行業(ye)，鉛(qian)(qian)(qian)主要(yao)用(yong)(yong)于(yu)(yu)處理硫(liu)酸(suan)(suan)的(de)(de)(de)(de)設備(bei)(bei)上。Pb4用(yong)(yong)作設備(bei)(bei)內襯，Pb6用(yong)(yong)作管(guan)道接頭，硬鉛(qian)(qian)(qian)可(ke)制造硫(liu)酸(suan)(suan)工業(ye)用(yong)(yong)的(de)(de)(de)(de)泵、閥門、管(guan)道等。